Merge pull request #59 from Jakedismo/wip-indexing-analyzers-doc

docs(indexing): add tier ux hint and expand README

feat(indexing): add tiered indexing presets

refactor(compression): update compression methods to use Base64 encoding and improve error handling

fix(indexing): restore LSP edge resolution

fix(lsp): prevent premature process kill by moving child handle to writer task

fix(lsp): cleanup code and finalize async client implementation

fix(lsp): correct syntax errors in async lsp client implementation

perf(lsp): parallelize LSP analysis with async client (16x concurrency)

chore(deps): bump rig-core 0.27.0 and rmcp 0.12.0

perf(indexing): speed up LSP enrichment throughput

chore(deps): add jobserver and zstd dependencies to Cargo.lock

perf(storage): implement transparent Zstd compression for content and metadata

fix(mcp): expose initial instructions prompt as codegraph:initial_instructions

fix(indexing): resolve lsp_uses zero-metric bug with triple-fix strategy