Rebrand to CometBFT in naming, documentation, links (#6)

* Rename logo images

* CometBFT rebranding in some root files

* cometbft: rebranding to CometBFT

Change documentation and URLs to CometBFT.
Reviewed changes in the cometbft crate.

* config: rebranding to CometBFT

Change to CometBFT naming in documentation, file paths and URLs.

* light-client: rebranding to CometBFT

Change to CometBFT naming in documentation and URLs.

Also updated the CLI and attack detector crates.

* light-client-js: rebranding to CometBFT

Change to CometBFT naming in documentation and URLs.

* light-client-verifier: rebranding to CometBFT

Change to CometBFT naming in documentation and URLs.

* proto: rebranding to CometBFT

Change to CometBFT naming in documentation and URLs.

* rpc: rebranding to CometBFT

Change to CometBFT naming in documentation and URLs.

* Rebranding to CometBFT In tests and tools

As part of the rename, environment variables affecting Dockerfile builds
have been changed:
TMHOME -> CMTHOME
TMVERSION -> CMTVERSION

The docker image name has been changed to informaldev/cometbft.

* docs: rebranding to CometBFT

Changed naming and repository URLs to refer to CometBFT.
Exceptions were made for links to old content, GitHub issues/PRs, etc.
that have not been replicated in the cometbft org repos.

* Apply naming suggestions by Thane

Co-authored-by: Thane Thomson <thane@informal.systems>

* config: rename CometbftConfig to Config

* tools/docker: remove abci-harness

The abci-harness image was used to test the terdermint-abci crate
which has been removed in transition to cometbft-rs.

* Reboot .changelog

Remove changelog entries from tendermint-rs releases and change
the epilogue to describe cometbft-rs as a fork of tendermint-rs,
providing a permalink to the last revision of CHANGELOG.md
before forking.

This does not touch the CHANGELOG.md file itself yet; it will be
updated with the next release.

* Changelog entries for CometBFT rebranding

* tools/docker: rename the dockerfile subdirectories

---------

Co-authored-by: Thane Thomson <thane@informal.systems>

.changelog/config.toml

@@ -1 +1 @@
-project_url = 'https://github.com/informalsystems/tendermint-rs'
+project_url = 'https://github.com/cometbft/cometbft-rs'

.changelog/unreleased/breaking-changes/1375-allow-null-in-event-attributes.md

@@ -1,4 +1,4 @@
-- `[tendermint]` Allow null values in `key` and `value` fields of
+- `[cometbft]` Allow null values in `key` and `value` fields of
   `EventAttribute` when deserializing. The serialization schema for the fields
   is changed to `Option<String>`
-  ([\#1375](https://github.com/informalsystems/tendermint-rs/issues/1375)).
+  ([tendermint-rs#1375](https://github.com/informalsystems/tendermint-rs/issues/1375)).

.changelog/unreleased/breaking-changes/5-cometbft-rs-rename.md

@@ -0,0 +1,9 @@
+- Bulk renaming to refer to CometBFT and cometbft-rs in crate names, APIs, and documentation,
+  with the general pattern of `tendermint` changed to `cometbft`, `Tendermint` to `Cometbft`, etc.
+  ([\#5](https://github.com/cometbft/cometbft-rs/issues/5))
+- The following tendermint-rs crates have been discontinued with no cometbft-rs successors
+  ([\#4](https://github.com/cometbft/cometbft-rs/pull/4)):
+  - `tendermint-abci`
+  - `tendermint-p2p`
+  - `tendermint-std-ext`
+  - `tendermint-test`

.changelog/unreleased/improvements/1378-expose-rpc-client-builders.md

@@ -1,3 +1,3 @@
-- `[tendermint-rpc]` Export the `http`, `websocket`
+- `[cometbft-rpc]` Export the `http`, `websocket`
   modules under `client`, each with the public `Builder` type
-  ([\#1378](https://github.com/informalsystems/tendermint-rs/pull/1378)).
+  ([tendermint-rs#1378](https://github.com/informalsystems/tendermint-rs/pull/1378)).