Squashed 'packages/mcp-typescript/' changes from dcc30be..e665be0

e665be0 Merge pull request modelcontextprotocol#14 from modelcontextprotocol/justin/fix-race-condition
be9c1fe Merge branch 'main' into justin/fix-race-condition
36ba802 Merge pull request modelcontextprotocol#17 from modelcontextprotocol/ashwin/capabilities
a1b8886 yarn build
7b718de Report errors when start() is called multiple times
83a43fd Protocol.connect() can automatically call Transport.start()
8d80cc5 Merge branch 'main' into justin/fix-race-condition
bcb4b21 add server capabilities derivation
e9c64fb Update tests and CLI
2b0599e Update server SSE transport
c39f808 Update client transports
87ae7ff Add start() to Transport interface

git-subtree-dir: packages/mcp-typescript
git-subtree-split: e665be0

Author: ashwin-ant