Media and blackboard math characters, migrate deprecated nf-mdi glyphs to nf-md

[breitnw]

This PR adds:

• Math characters commonly used in the language Agda (specifically, those seen in the Iowa Agda Library). This PR introduces all of the missing capital double-struck characters, left and right flattened parentheses, and multiset operations. I also modified the existing double-struck characters because they did not have a gap between strikes, making it hard to discern them from regular bold characters.
• Media control emojis for shuffle, repeat, and repeat-once. This is useful for terminal-based music players, such as rmpc.
• A number of glyphs in the nf-md-* range. All of these glyphs were previously present in Cozette's nf-mdi-* range, which is now deprecated by nerd-fonts. Tools such as Emacs' nerd-fonts package do not support nf-mdi-* icons, so I felt it was important to move them to the non-deprecated range.

Added

• ⊌ (U+228C MULTISET)
• ⊍ (U+228D MULTISET MULTIPLICATION)
• ⊎ (U+228E MULTISET UNION)
• ⟮ (U+27EE MATHEMATICAL LEFT FLATTENED PARENTHESIS)
• ⟯ (U+27EF MATHEMATICAL RIGHT FLATTENED PARENTHESIS)
• 𝔸 (U+1D538 MATHEMATICAL DOUBLE-STRUCK CAPITAL A)
• 𝔹 (U+1D539 MATHEMATICAL DOUBLE-STRUCK CAPITAL B)
• 𝔻 (U+1D53B MATHEMATICAL DOUBLE-STRUCK CAPITAL D)
• 𝔼 (U+1D53C MATHEMATICAL DOUBLE-STRUCK CAPITAL E)
• 𝕀 (U+1D540 MATHEMATICAL DOUBLE-STRUCK CAPITAL I)
• 𝕁 (U+1D541 MATHEMATICAL DOUBLE-STRUCK CAPITAL J)
• 𝕂 (U+1D542 MATHEMATICAL DOUBLE-STRUCK CAPITAL K)
• 𝕃 (U+1D543 MATHEMATICAL DOUBLE-STRUCK CAPITAL L)
• 𝕄 (U+1D544 MATHEMATICAL DOUBLE-STRUCK CAPITAL M)
• 𝕆 (U+1D546 MATHEMATICAL DOUBLE-STRUCK CAPITAL O)
• 𝕋 (U+1D54B MATHEMATICAL DOUBLE-STRUCK CAPITAL T)
• 𝕌 (U+1D54C MATHEMATICAL DOUBLE-STRUCK CAPITAL U)
• 𝕍 (U+1D54D MATHEMATICAL DOUBLE-STRUCK CAPITAL V)
• 𝕐 (U+1D550 MATHEMATICAL DOUBLE-STRUCK CAPITAL Y)
• 🔀 (U+1F500 TWISTED RIGHTWARDS ARROWS)
• 🔁 (U+1F501 CLOCKWISE RIGHTWARDS AND LEFTWARDS OPEN CIRCLE ARROWS)
• 🔂 (U+1F502 CLOCKWISE RIGHTWARDS AND LEFTWARDS OPEN CIRCLE ARROWS WITH CIRCLED ONE OVERLAY)
• 󰂯 (U+F00AF)
• 󰂰 (U+F00B0)
• 󰂱 (U+F00B1)
• 󰂲 (U+F00B2)
• 󰂽 (U+F00BD)
• 󰂾 (U+F00BE)
• 󰃬 (U+F00EC)
• 󰄲 (U+F0132)
• 󰄳 (U+F0133)
• 󰅙 (U+F0159)
• 󰅚 (U+F015A)
• 󰅩 (U+F0169)
• 󰅪 (U+F016A)
• 󰅴 (U+F0174)
• 󰆍 (U+F018D)
• 󰆧 (U+F01A7)
• 󰆺 (U+F01BA)
• 󰆻 (U+F01BB)
• 󰆼 (U+F01BC)
• 󰈀 (U+F0200)
• 󰈔 (U+F0214)
• 󰈙 (U+F0219)
• 󰈛 (U+F021B)
• 󰈝 (U+F021D)
• 󰈟 (U+F021F)
• 󰈣 (U+F0223)
• 󰈫 (U+F022B)
• 󰈬 (U+F022C)
• 󰉋 (U+F024B)
• 󰊄 (U+F0284)
• 󰊕 (U+F0295)
• 󰊸 (U+F02B8)
• 󰋋 (U+F02CB)
• 󰋌 (U+F02CC)
• 󰋍 (U+F02CD)
• 󰋎 (U+F02CE)
• 󰋐 (U+F02D0)
• 󰋚 (U+F02DA)
• 󰋼 (U+F02FC)
• 󰌋 (U+F030B)
• 󰌗 (U+F0317)
• 󰌳 (U+F0333)
• 󰌴 (U+F0334)
• 󰌵 (U+F0335)
• 󰌶 (U+F0336)
• 󰌷 (U+F0337)
• 󰌸 (U+F0338)
• 󰌽 (U+F033D)
• 󰎇 (U+F0387)
• 󰎠 (U+F03A0)
• 󰏗 (U+F03D7)
• 󰏘 (U+F03D8)
• 󰏿 (U+F03FF)
• 󰪷 (U+F0AB7)

Changed

• ℂ (U+2102 DOUBLE-STRUCK CAPITAL C)
• ℍ (U+210D DOUBLE-STRUCK CAPITAL H)
• ℕ (U+2115 DOUBLE-STRUCK CAPITAL N)
• ℙ (U+2119 DOUBLE-STRUCK CAPITAL P)
• ℚ (U+211A DOUBLE-STRUCK CAPITAL Q)
• ℝ (U+211D DOUBLE-STRUCK CAPITAL R)
• ℤ (U+2124 DOUBLE-STRUCK CAPITAL Z)

Image of new glyphs