feat: Implement topic aliases + fix bugs

[Bertie690]

No description provided.

[Copilot]

Pull request overview

This PR adds first-class help-topic aliases backed by a new topic_aliases table, integrates alias resolution into topic lookup/autocomplete, and introduces new Discord bot commands for managing aliases.

Changes:

• Add DB schema + store/db APIs for topic aliases (list/add/delete) and wire migrations to create/drop topic_aliases.
• Update /help and autocomplete to optionally include aliases, and add /add-alias + /remove-alias commands.
• Refactor a few DB access patterns and tighten some command UX/validation helpers.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
db/store.go	Adds alias data model + CRUD/query methods; minor refactors to topic retrieval/deletion.
db/migrations/00002_add_aliases.up.sql	Creates the topic_aliases table.
db/migrations/00002_add_aliases.down.sql	Drops the topic_aliases table.
db/migrations.go	Embeds/applies the new migration and improves migration logging metadata.
db/db.go	Exposes alias APIs and updates topic retrieval to resolve aliases.
commands/utils.go	Adds shared topic/alias validation and optional alias inclusion in topic lists.
commands/remove-alias.go	New /remove-alias command.
commands/help.go	Enables alias-inclusive autocomplete for /help.
commands/get-topics.go	Adds include-aliases option and passes it through to topic listing output.
commands/delete-topic.go	Updates messaging and autocomplete behavior around deletions.
commands/constants.go	Adds a constant for autocomplete choice display length.
commands/autocomplete.go	Adds alias-inclusive autocomplete + alias-only autocomplete helper.
commands/all-commands.go	Registers the new alias commands.
commands/add-help.go	Adjusts add-help UX to resolve aliases and refactors timestamp encoding helpers.
commands/add-alias.go	New /add-alias command.

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[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 5 comments.