Add transcription functionality and AWS TTS integration to bot

[mervyn-teo]

• Implement voice transcription capabilities using Discord voice channels.
• Introduce channels for managing transcription messages and playback.
• Update bot structure to support AWS TTS configuration and audio playback.
• Modify message handling to accommodate new message types for transcription.
• Enhance .gitignore to exclude sensitive environment files.

[codecov]

Codecov Report

❌ Patch coverage is 1.75695% with 671 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
transcribe/transcribe.go	0.00%	499 Missing ⚠️
internal/bot/bot.go	6.52%	129 Missing ⚠️
internal/tts/tts.go	0.00%	21 Missing ⚠️
internal/router/chat.go	11.76%	14 Missing and 1 partial ⚠️
cmd/api/main.go	0.00%	5 Missing ⚠️
internal/music/music.go	0.00%	1 Missing ⚠️
internal/tools/musicfunctions.go	50.00%	1 Missing ⚠️

Files with missing lines	Coverage Δ
internal/voiceChatUtils/voiceChatUtils.go	0.00% <ø> (ø)
internal/music/music.go	0.80% <0.00%> (-0.01%)	⬇️
internal/tools/musicfunctions.go	70.58% <50.00%> (-0.19%)	⬇️
cmd/api/main.go	0.00% <0.00%> (ø)
internal/router/chat.go	77.62% <11.76%> (-4.30%)	⬇️
internal/tts/tts.go	0.00% <0.00%> (-62.97%)	⬇️
internal/bot/bot.go	20.55% <6.52%> (-8.45%)	⬇️
transcribe/transcribe.go	0.00% <0.00%> (ø)

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