feat: Implement --hyperlink=auto

[henryhchchc]

Implement --hyperlink=auto/always/never. This enables eza to embed hyperlinks only when printing to a terminal.

Fixes #1093
Fixes #703

[henryhchchc]

The test is obsolete

eza> Testing tests/gen/long_time_style_relative_nix.toml ... failed 16ms 475us 986ns

eza> ---- expected: stdout
eza> ++++ actual:   stdout
eza>    1      - drwxr-xr-x - nixbld 55 years git
eza>    2      - drwxr-xr-x - nixbld 55 years grid
eza>    3      - drwxr-xr-x - nixbld 55 years group
eza>    4      - drwxr-xr-x - nixbld 55 years icons
eza>    5      - drwxr-xr-x - nixbld 55 years perms
eza>    6      - drwxr-xr-x - nixbld 55 years size
eza>    7      - drwxr-xr-x - nixbld 55 years specials
eza>    8      - drwxr-xr-x - nixbld 55 years symlinks
eza>    9      - drwxr-xr-x - nixbld 55 years time
eza>         1 + drwxr-xr-x - nixbld 56 years git
eza>         2 + drwxr-xr-x - nixbld 56 years grid
eza>         3 + drwxr-xr-x - nixbld 56 years group
eza>         4 + drwxr-xr-x - nixbld 56 years icons
eza>         5 + drwxr-xr-x - nixbld 56 years perms
eza>         6 + drwxr-xr-x - nixbld 56 years size
eza>         7 + drwxr-xr-x - nixbld 56 years specials
eza>         8 + drwxr-xr-x - nixbld 56 years symlinks
eza>         9 + drwxr-xr-x - nixbld 56 years time
eza> stderr: