backtester: standalone application (#988)

* Ramshackle early leads to GRPC backtester

* Adds GRPC server, default config generation

* Partial support for GRPC backtester config

* Update to use Buf, merge fixes

* Full config for GRPC

* Adds new commands, causes big panic

* Fixes panics

* Setup for the future

* Docs update

* test

* grpc tests

* Fix merge issues. Lint and test

* minor fixes after rebase

* Docs, formatting and main fixes

* Change buf owner

* shazNits

* test-123

* rpc fixes

* string fixes

* Removes --singlerun flag and just relies on --singlerunstrategypath

* fixes test

* initial post merge compatability fixes

* this actually all seems to work? unexpected

* adds pluginpath to config

* rm unused func. add gitignore

* rm unused func. add gitignore

* lintle

* tITLE cASE lOG fIX,rm auth package, gitignore, tmpdir fix

* buf updates + gen. go mod tidy

* x2

* Update default port, update error text

.github/workflows/proto-lint.yml

@@ -35,3 +35,14 @@ jobs:
           
       - name: buf format
         run: buf format --diff --exit-code
+
+      - name: buf generate backtester
+        working-directory: ./backtester/btrpc
+        run: buf generate
+
+      - uses: bufbuild/buf-lint-action@v1
+        with:
+          input: ./backtester/btrpc
+
+      - name: buf format backtester
+        run: buf format --diff --exit-code