Merge branch 'main' into openutau

Author: zkoppert

collections/opensource-testing/index.md

@@ -43,7 +43,7 @@ items:
  - stefanjudis/grunt-photobox
  - nathanmarks/vrtest
  - reg-viz/reg-cli
- - segmentio/nightmare
+ - segment-boneyard/nightmare
  - reg-viz/reg-suit
  - xolvio/chimp
  - NimaSoroush/differencify

topics/cst/index.md

@@ -0,0 +1,9 @@
+---
+display_name: Concrete syntax tree
+short_description: A concrete syntax tree is a low level representation of the parsed source in the structure defined by a grammar description.
+topic: cst
+aliases: parse-tree, parsing-tree, derivation-tree
+wikipedia_url: https://en.wikipedia.org/wiki/Parse_tree
+related: ast
+---
+A concrete syntax tree is an ordered, rooted tree that represents the syntactic structure of a string according to some context-free grammar.

topics/flow-blockchain/flow-blockchain.png

@@ -0,0 +1,15 @@
+---
+created_by: Flow
+display_name: Flow blockchain
+logo: flow-blockchain.png
+released: September 29, 2020
+short_description: Flow is a permissionless layer 1 blockchain.
+topic: flow-blockchain
+aliases: onflow
+related: cadence, blockchain, cryptocurrency, smart-contracts, web3, dapps
+url: https://flow.com
+github_url: https://github.com/onflow
+---
+Flow blockchain is a scalable, fast, and developer-friendly blockchain platform designed to support high-throughput applications, such as games and digital collectibles, without the need for layer-two solutions or sharding.
+
+Unlike traditional blockchain architectures, Flow utilizes a [unique multi-node design](https://flow.com/primer#primer-how-flow-works), where different types of nodes perform distinct tasks - execution, verification, collection, and consensus. This design allows for significant improvements in scalability while preserving decentralization and security.

topics/flow-blockchain/index.md

@@ -0,0 +1,12 @@
+---
+display_name: Nextra
+short_description: Nextra is a simple, powerful and flexible site generation framework built with next.js.
+topic: nextra
+github_url: https://github.com/shuding/nextra
+url: https://nextra.site/
+related: nextjs, mdx, markdown
+logo: nextra.png
+---
+
+Nextra is a nextjs-based static site generation framework using markdown and MDX. 
+Nextra framework is specially built to create markdown-based documentation and portfolio blogs without coding using MDX and markdown.