Migrate Neovim configuration from ALE to native LSP

[Copilot]

Replaces ALE plugin with Neovim's native LSP infrastructure for better performance, modern completion, and standard ecosystem integration.

Changes

Plugins

• Removed: dense-analysis/ale
• Added LSP: nvim-lspconfig, mason.nvim, mason-lspconfig.nvim
• Added completion: nvim-cmp, cmp-nvim-lsp, cmp-buffer, cmp-path, LuaSnip, cmp_luasnip
• Added formatting: conform.nvim

Language Servers (nvim/lua/main/configs/lsp.lua)

• Rust: rust-analyzer (clippy enabled)
• Python: pyright
• C/C++: clangd
• TypeScript/JavaScript: ts_ls + eslint
• Terraform: terraformls

Formatters

• Rust: rustfmt
• Python: black
• JS/TS: eslint_d
• C/C++: clang-format
• Terraform: terraform_fmt

LSP Keybindings

gd              -- Go to definition
gr              -- Find references
K               -- Hover documentation
<leader>rn      -- Rename symbol
<leader>ca      -- Code actions
<leader>f       -- Format buffer
[d / ]d         -- Navigate diagnostics

Completion

• Tab/S-Tab navigation
• Snippet expansion with LuaSnip
• Context-aware suggestions from LSP, buffer, and path sources

Migration Notes

LSP servers auto-install via Mason on first run. Format-on-save preserved. All previous ALE linters/fixers mapped to LSP equivalents.

Original prompt

Port the Neovim configuration from ALE to Neovim LSP. The Neovim configurations are the nvim directory

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