Large pastes are split into 8 KiB chunks on the client side,
each stored separately in a dedicated chunks/ directory.
A version-2 manifest paste lists the chunk hashes and is
announced to the DHT; chunks replicate via periodic republish
with per-put throttling to avoid rate-limit bans.

- New PUTC/PUTM protocol commands for chunks and manifests
- Client-side chunking avoids O(n^2) base58 on large content
- HTTP handler reassembles chunks directly from store
- DHT sync routes incoming chunks to chunks/ directory
- Republish interval reduced to 5 min with 200ms throttle
- tp.1 updated with new 1.44 MB limit

- Block marker on delete prevents DHT re-import
- Remote delete propagation via delete_callback
- New index page with project info and man page links
- Fix lookups status order (started/completed)

When the routing table drops to zero peers, the daemon now
re-joins bootstrap nodes every 60s, unbanning their addresses
first so replies are not silently discarded.

Both tp and tpd accept -v for debug-level output without
needing RUST_LOG environment variable.

- Rewrite README with features, usage, and links
- Bump tesseras-dht dependency from 0.1.0 to 0.1.1
- Add CODE_OF_CONDUCT.md and SECURITY.md

- tp: limit stdin to 64 KiB + 1 byte to reject oversized pastes
  early without unbounded memory allocation
- daemon: bound the oversized-line drain to MAX_LINE_SIZE so a
  client without newlines cannot block beyond the read timeout
- tpd: document intentional Arc::into_raw leak in signal handler