feat: Allow customization of logs timestamp color

[laurent-so-1]

Description

This PR add an option timeColor to allow customization of logs timestamp color from a skin.
It will default to gray as previously.

Fixes #2875

make test

?       github.com/derailed/k9s [no test files]
ok      github.com/derailed/k9s/cmd     0.096s
ok      github.com/derailed/k9s/internal        0.021s
ok      github.com/derailed/k9s/internal/client 0.044s
ok      github.com/derailed/k9s/internal/color  0.004s
ok      github.com/derailed/k9s/internal/config 0.101s
ok      github.com/derailed/k9s/internal/config/data    0.039s
ok      github.com/derailed/k9s/internal/config/json    0.408s
?       github.com/derailed/k9s/internal/config/mock    [no test files]
ok      github.com/derailed/k9s/internal/dao    0.118s
ok      github.com/derailed/k9s/internal/health 0.023s
ok      github.com/derailed/k9s/internal/model  2.118s
ok      github.com/derailed/k9s/internal/model1 0.034s
?       github.com/derailed/k9s/internal/perf   [no test files]
ok      github.com/derailed/k9s/internal/port   0.010s
ok      github.com/derailed/k9s/internal/render 0.197s
?       github.com/derailed/k9s/internal/render/helm    [no test files]
?       github.com/derailed/k9s/internal/slogs  [no test files]
ok      github.com/derailed/k9s/internal/tchart 0.006s
ok      github.com/derailed/k9s/internal/ui     0.082s
ok      github.com/derailed/k9s/internal/ui/dialog      0.543s
ok      github.com/derailed/k9s/internal/view   0.068s
ok      github.com/derailed/k9s/internal/view/cmd       0.013s
ok      github.com/derailed/k9s/internal/vul    0.031s
ok      github.com/derailed/k9s/internal/watch  0.012s
ok      github.com/derailed/k9s/internal/xray   0.059s

make cover

        github.com/derailed/k9s         coverage: 0.0% of statements
ok      github.com/derailed/k9s/cmd     0.077s  coverage: 32.2% of statements
ok      github.com/derailed/k9s/internal        0.019s  coverage: 82.5% of statements
ok      github.com/derailed/k9s/internal/client 0.036s  coverage: 31.8% of statements
ok      github.com/derailed/k9s/internal/color  0.006s  coverage: 100.0% of statements
ok      github.com/derailed/k9s/internal/config 0.074s  coverage: 74.0% of statements
ok      github.com/derailed/k9s/internal/config/data    0.031s  coverage: 61.9% of statements
ok      github.com/derailed/k9s/internal/config/json    0.254s  coverage: 47.9% of statements
        github.com/derailed/k9s/internal/config/mock            coverage: 0.0% of statements
ok      github.com/derailed/k9s/internal/dao    0.099s  coverage: 11.0% of statements
ok      github.com/derailed/k9s/internal/health 0.016s  coverage: 57.1% of statements
ok      github.com/derailed/k9s/internal/model  2.113s  coverage: 34.8% of statements
ok      github.com/derailed/k9s/internal/model1 0.034s  coverage: 56.5% of statements
        github.com/derailed/k9s/internal/perf           coverage: 0.0% of statements
ok      github.com/derailed/k9s/internal/port   0.009s  coverage: 69.3% of statements
ok      github.com/derailed/k9s/internal/render 0.088s  coverage: 59.0% of statements
        github.com/derailed/k9s/internal/render/helm            coverage: 0.0% of statements
        github.com/derailed/k9s/internal/slogs          coverage: 0.0% of statements
ok      github.com/derailed/k9s/internal/tchart 0.004s  coverage: 21.2% of statements
ok      github.com/derailed/k9s/internal/ui     0.090s  coverage: 55.5% of statements
ok      github.com/derailed/k9s/internal/ui/dialog      0.547s  coverage: 31.8% of statements
ok      github.com/derailed/k9s/internal/view   0.088s  coverage: 14.8% of statements
ok      github.com/derailed/k9s/internal/view/cmd       0.015s  coverage: 80.0% of statements
ok      github.com/derailed/k9s/internal/vul    0.034s  coverage: 32.2% of statements
ok      github.com/derailed/k9s/internal/watch  0.013s  coverage: 10.6% of statements
ok      github.com/derailed/k9s/internal/xray   0.060s  coverage: 61.2% of statements

[laurent-so-1]

@derailed Do you think it is something interesting?

If you do, I will try to give the same treatment to all hard-coded colors.