doc: Improved readme and cleanup todo

.vscode/settings.json

@@ -97,6 +97,7 @@
         "OSFS",
         "Packetized",
         "pcap",
+        "pcapng",
         "pmezard",
         "println",
         "protobuf",

README.md

@@ -1,14 +1,15 @@
 # fq
 
-Tool, language and decoders for exploring binary data.
+Tool, language and decoders for inspecting binary data.
 
 ![fq demo](doc/demo.svg)
 
-In most cases it works the same way of jq but instead of reading JSON it reads binary formats into
-a JSON compatbile structure. Also each value knows from which bit ranges it comes from, can have
-symbolic interprestations and knows how to be presented in a useful way.
+In most cases fq works the same way as jq but instead of reading JSON it reads binary data.
+The result is a JSON compatbile structures where each each value knows from which bit ranges
+it comes from, can have symbolic interprestations and know how to be presented in useful ways.
 
-**NOTE:** fq is early in development and many things are missing, broken or do not make sense. That also means there is a great opportunity to help out.
+**NOTE:** fq is early in development and many things are missing, broken or do not make sense.
+That also means there is a great opportunity to help out.
 
 ## Goals
 
@@ -27,7 +28,7 @@ For details see [usage.md](doc/usage.md)
 ## Install
 
 Download archive from [releases](https://github.com/wader/fq/releases) page for your
-platform, unarchive and move the executable to `PATH`.
+platform, unarchive it and move the executable to `PATH` etc.
 
 ### Homebrew
 
@@ -80,7 +81,7 @@ See [dev.md](doc/dev.md)
 ## Thanks and related projects
 
 This project would not have been possible without [itchyny](https://github.com/itchyny)'s
-jq implementation [gojq](https://github.com/itchyny/gojq). Also want to thank
+jq implementation [gojq](https://github.com/itchyny/gojq). I also want to thank
 [HexFiend](https://github.com/HexFiend/HexFiend) for inspiration and ideas and [stedolan](https://github.com/stedolan)
 for inventing the [jq](https://github.com/stedolan/jq) language.
 

doc/TODO.md

@@ -1,12 +1,12 @@
 ### Known bugs to fix
 
+- Value errors, can only be accessed with `._error`.
 - Framed (add unknown in gaps) decode should be on struct level not format?
-- Refactor decode.Value into interfaces(s) and impl per type?
 - `tovalue({bits_format: "base64"})` only affect root value.
 - Auto complete of non-global variables is broken. `scope` is broken for variables.
 - `echo '{} {} {}' | jq` vs `echo '{} {} {}' | fq` works differently. fq currently decodes one root format and might add unknown fields etc. Maybe should work differently for `json` format?
 - `format/0` overlap with jq builtin `format/1`. What to rename it to? `decode_format`?
-- repl expression returning a value that produced lots of output can't be interrupted. This is becaus ctrl-C currently only interrupts the evaluation of the expression, outputted value is printed (`display`) by parent.
+- repl expression returning a value that produced lots of output can't be interrupted. This is becaus ctrl-c currently only interrupts the eval interpreter, outputted value is printed (`display`) by parent interpreter.
 - Rework cli/repl user interrupt (context cancel via ctrl-c), see comment in Interp.Main
 - Optimize `Interp.Options` calls, now called per display. Cache per eval? needs to handle nested evals.
 
@@ -99,7 +99,6 @@
 
 #### Formats
 
-- Network protocols, pcap?
 - Pass argument to format
 - Value decoder in jq `u(32)`, `u32`?
 - Warnings and errors